深圳湾及邻近沿岸沉积物中碳、氮和磷的分布

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Abstract

Data obtained biannually from 1998 to 2014 were used for analyzing and studying temporal and spatial distributions of the biogeochemical parameters,including the total carbon (TC),total organic carbon (TOC),total nitrogen (TN) and total phosphorus (TP),in the surface sediments of the Shenzhen Bay and coastal southeastern Pearl River Estuary.Also sources of the organic matter in the sediments were identified on the basis of the C:N atomic ratio.The results showed that the TC,TOC,TN and TP concentrations were (13200±3600),(12200±3200),(910±352) and (594±288) mg/kg respectively in the bay,and were (12000±3900),(8700±2300),(601±259) and (334±119) mg/kg respectively in the estuary.Both the TC and TN concentrations had witnessed an increase trend,while the TOC concentration had witnessed a decrease one in the sediments studied from 1998 to 2014.However,the TP concentration changed with a decrease trend in the bay and an increase one in the estuary during the period studied.The TOC:TN atomic ratio was about 17.7 in the bay and 19.5 in the estuary,and had undergone a decrease trend in both the bay and estuary from 1998 to 2014.The sedimentary organic matter (SOM) was a mixture from both of the terrestrial and aquatic sources,dominating with the aquatic one in the bay and with the terrestrial one in the estuary.A shift from the terrestrial dominance to the aquatic one of the surface SOM sources had been found in the area studied from 1998 to 2014.

Key words： Shenzhen Bay Pearl River Estuary surface sediments biogeochemical parameters C:N atomic ratio sources of organic matter

Received: 17 October 2016

PACS:	X55
	X142

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	XU Chun-ling
	LI Xu-lu
	LIN Fan

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XU Chun-ling,LI Xu-lu,LIN Fan. Distributions of carbon,nitrogen and phosphorus in the surface sediments of the Shenzhen Bay and adjacent coastal area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(7): 2691-2698.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I7/2691

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